28360321 has 8 divisors (see below), whose sum is σ = 31176288. Its totient is φ = 25584000.

The previous prime is 28360313. The next prime is 28360333. The reversal of 28360321 is 12306382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28360321 - 2³ = 28360313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28360351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8400 + ... + 11281.

It is an arithmetic number, because the mean of its divisors is an integer number (3897036).

Almost surely, 2^28360321 is an apocalyptic number.

It is an amenable number.

28360321 is a deficient number, since it is larger than the sum of its proper divisors (2815967).

28360321 is a wasteful number, since it uses less digits than its factorization.

28360321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19823.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 28360321 is about 5325.4409207126. The cubic root of 28360321 is about 304.9559051187.

The spelling of 28360321 in words is "twenty-eight million, three hundred sixty thousand, three hundred twenty-one".